Cross-striations- Multi-nucleate= many nuclei- Cross striations

What is visceral (smooth) muscle?

What is the structure of smooth muscle?

No cross-striations- One nucleus- Randomly space

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What is cardiac muscle?

Long, cylindrical cells,One or two nuclei centrally located - Shorter fibres - Connected end to end by complex junctions (intercalated disks/discs)Cardiac muscle cells have intrinsic contractibilityOne or two nuclei, fibres are shorter for quick contraction

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What is sacrolemma?

Plasma membrane

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What is sacroplasm?

cytoplasm

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What is Sacroplasmic reticulum?

Endoplasmic reticulum

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What are sacrosomes?

Mitochondria (for energy, passed on from mother)

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What are the features of skeletal muscles?

• Variety of shapes and sizes (morphology)• Elongated, multinucleate contractile cells (muscle fibres)• Vary in diameter from 10-100µm (i.e. x10−6)• Can extend throughout the whole length of a muscle i.e.35cm